landscape panorama of kerid crater lake, caldera along the golden circle, western iceland

american arctic area atlantic attraction caldera circle colorful colourful crater depression environment eruption europe european fissure geological geology golden hike hiking iceland keriadeg kerid kerith lake landscape major moving natural nature north outdoor outdoors panorama path plate plates reykjavik rift rim round shield tectonic tectonics tourist trail tuff volcanic volcanism volcano volcanoes water west western